1. Biotic environment
includes
(a)
producers
(b) consumers
(c)
decomposers
(d) all the above
Answer: (d) all the above
2. Decomposers include
(a)
bacteria
(b) fungi
(c)
both (d)
animals
Answer: (c) both
3. Abiotic environment
does not include
(a)
air
(b) water
(c)
soil (d)
plants
Answer: (d) plants
4. Vermicomposting is
done by
(a)
fungus
(b) bacteria
(c) worms
(d) animals
Answer: (c) worms
5. The group of
organisms which convert light into food are called
(a)
autotrophs
(b) heterotrophs
(c)
decomposers (d)
omnivores
Answer: (a) Autotrophs
6. Which one the
following is not biodegradable?
(a)
vegetables
(b) fruits
(c)
earthworm (d)
aluminium foil
Answer: (d) Aluminium Foil
7. Animal(s) which
is/are active at night.
(a)
owl
(b) rat
(c)
cockroach (d)
all the above
Answer: (d) All the above
8. An animal that can
tolerate the heat of the desert is
(a)
rats
(b) camel
(c)
cow
(d) lion
Answer: (b) camel
9. Air pollution is
caused by
(a)
Insecticides
(b) Sewage
(c)
Smoke
(d) Loud speakers
Answer: (c) smoke
10. If waste materials
contaminate the source of drinking water which of the following diseases will
spread?
(a)
Scurvy
(b) Typhoid
(c)
Malaria
(d) Anaemia
Answer: (b) Typhoid
11. In our country the
Van Mahotsav Day is observed on
(a) Second of
October (b) First of
December
(c) Tenth of
August
(d) First of July
Answer: (d) First of July
12. Which of the
following wastes cannot be decomposed by bacteria to form compost?
(a) Kitchen
wastes
(b) Plastic and polythene bags
(c) dead
plants (d)
bodies of insects living in the soil
Answer: (b) Plastic and polythene
bags
13. Which of the
following problems is not created by noise pollution ?
(a)
Diarrhoea
(b) Hypertension
(c)
Deafness
(d) Irritation
Answer: (a) Diarrhoea
14. Plants are green
because of the presence of a pigment called:
(a)
glucose
(b) nitrogen
(c)
chlorophyll
(d) oxygen
Answer: (a) chlorophyll
15. Air is composed of
gases, water vapours and
(a) dust
particles
(b) rainfall
(c)
snowfall
(d) light
Answer: (a) dust particles
16. Medicine of quinine
is provided by
(a) Eucalyptus
plant
(b) aconite plant
(c) cinchona
plant
(d) money plant
Answer: (c) cinchona plant
17. Chief source of
energy in environment is
(a)
fire
(b) moon
(c)
sun
(d) stars
Answer: (c) sun
18. When trees are cut,
amount of oxygen
(a)
decreases (b)
increases
(c) both (a) and
(b)
(d) remains same
Answer: (a) decreases
19. Process through
which plants reproduce:
(a)
Eating
(b) Evaporation
(c)
Pollination (d)
Condensation
Answer: (c) pollination
20. 71% of earth surface
is covered with:
(a)
land
(b) air
(c)
water
(d) coal
Answer: (c) water
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